Chemical Engineering MCQs

Page No. 837

Annealing of cast iron__________________?


aSoftens it to facilitate machining

✓


bDecreases the free carbon

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cIncreases the strength

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dNone of these

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The dew point of moist air becomes ____________________ with decrease in its relative humidity ?


aLess than the wet bulb temperature

✓


bMore than the wet bulb temperature

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cMore than the dry bulb temperature

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dEqual to wet bulb temperature

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Basicity [%Cao + %MgO + %SiO2) of the slag in Indian blast furnace is in the range of___________________?


a0.7-1.0

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b1.1-1.4

✓


c1.5 – 1.8

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d2.0 – 2.5

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View Answer 1.1-1.4

The most commonly used moderator in nuclear power plants is__________________?


aGraphite

✓


bLight water

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cHeavy water

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dBeryllium

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View Answer Graphite

_____________________ remains constant during the adiabatic cooling of moist air?


aWet bulb temperature

✓


bDry bulb temperature

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cRelative humidity

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dSpecific humidity

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View Answer Wet bulb temperature

Dryness factor of steam is defined as the ratio of the mass of vapor in the mixture to the mass of the mixture. Dryness factor of steam is measured by a _______________ calorimeter ?


aBomb

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bThrottling

✓


cJunker’s

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dBoy’s

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View Answer Throttling

Yield strength of a material is determined by the __________________ test?


aCreep

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bTension

✓


cCompression

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dEndurance

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View Answer Tension

Hot extrusion process is not used for making____________________?


aCast iron pipe for domestic water supply

✓


bAluminium curtain rods

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cStainless steel tubes used in furnitures

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dAny of these

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In an eutectic system, two elements are completely____________________?


aSoluble in solid state

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bInsoluble in liquid state

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cInsoluble in both solid & liquid state

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dSoluble in liquid state

✓



Maraging steels derive their strength from the following mechanism ?


aA fine, highly dislocated and strong martensite

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bFine dispersions of inter-metallic of Fe, Ni, Ti etc

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cFine dispersions of alloy carbides in a ferrite matrix

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dFine dispersions of Fe3 C nucleated on dislocations in austenite

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